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1. Effect of Powdery Scab Root Galls on Yield of Potato

Author:
Johnson, Dennis A.; Cummings, Thomas F.
Source:
Plant disease 2015 v.99 no.10 pp. 1396-1403
ISSN:
0191-2917
Subject:
Spongospora subterranea; basins; cultivars; pathogens; potatoes; regression analysis; root galls; roots; soil; stolons; tubers; yield components; Oregon; Washington (state)
Abstract:
... Powdery scab of potato, caused by Spongospora subterranea f. sp. subterranea, has increased in incidence since 1981 to become a major concern for potato production in the Columbia Basin of south-central Washington and north-central Oregon. Disease symptoms consist of pustules on the tuber surface and wart-like galls on roots, stolons, and tubers. In the current study, the effect of powdery scab ro ...
DOI:
10.1094/PDIS-11-14-1170-RE

2. Evaluation and Association Mapping of Resistance to Tan Spot and Stagonospora Nodorum Blotch in Adapted Winter Wheat Germplasm

Author:
Liu, Zhaohui; El-Basyoni, Ibrahim; Kariyawasam, Gayan; Zhang, Guorong; Fritz, Allan; Hansen, Jana; Marais, Francois; Friskop, Andrew; Chao, Shiaoman; Akhunov, Eduard; Baenziger, P. Stephen
Source:
Plant disease 2015 v.99 no.10 pp. 1333-1341
ISSN:
0191-2917
Subject:
Leptosphaeria nodorum; Pyrenophora tritici-repentis; breeding; chromosome mapping; chromosomes; cultivars; fungi; germplasm; greenhouses; hard red winter wheat; pathogens; quantitative trait loci; winter wheat; Great Plains region; United States
Abstract:
... Tan spot and Stagonospora nodorum blotch (SNB), often occurring together, are two economically significant diseases of wheat in the Northern Great Plains of the United States. They are caused by the fungi Pyrenophora tritici-repentis and Parastagonospora nodorum, respectively, both of which produce multiple necrotrophic effectors (NE) to cause disease. In this work, 120 hard red winter wheat (HRWW ...
DOI:
10.1094/PDIS-11-14-1131-RE

3. Incidence and Etiology of Postharvest Fungal Diseases of Persimmon (Diospyros kaki Thunb. cv. Rojo Brillante) in Spain

Author:
Palou, Lluís; Montesinos-Herrero, Clara; Tarazona, Ignacio; Besada, Cristina; Taberner, Verónica
Source:
Plant disease 2015 v.99 no.10 pp. 1416-1425
ISSN:
0191-2917
Subject:
Alternaria alternata; Botrytis cinerea; Cladosporium cladosporioides; DNA; Diospyros kaki; Glomerella cingulata; Lasiodiplodia theobromae; Neofusicoccum; Neopestalotiopsis clavispora; Penicillium expansum; cold storage; cultivars; fungi; orchards; pathogenicity; pathogens; persimmons; postharvest diseases; Spain
Abstract:
... ‘Rojo Brillante’ is currently the most important persimmon cultivar in Spain. The incidence and etiology of postharvest diseases affecting this cultivar were determined under local conditions. Latent and wound pathogens were assessed for two consecutive seasons on commercially grown persimmons from two orchards. Healthy persimmons were either surface-disinfested or artificially wounded on the rind ...
DOI:
10.1094/PDIS-01-15-0112-RE

4. Pathogenicity Stimulation of Sclerotinia sclerotiorum by Subtoxic Doses of Carbendazim

Author:
Di, Ya-Li; Zhu, Zu-Qing; Lu, Xiao-Ming; Zhu, Fu-Xing
Source:
Plant disease 2015 v.99 no.10 pp. 1342-1346
ISSN:
0191-2917
Subject:
Sclerotinia sclerotiorum; carbendazim; fungi; fungicide resistance; fungicides; hydrogen peroxide; leaves; oxalic acid; oxidative stress; paraquat; pathogenicity; pathogens; rapeseed; secretion; China
Abstract:
... Sclerotinia sclerotiorum is a devastating ascomycete fungus capable of infecting more than 400 species of plants worldwide. Carbendazim has been a principal fungicide for control of this pathogen and high levels of carbendazim resistance have been reported in eastern China. In this study, stimulatory effect of subtoxic doses of carbendazim on pathogenicity of S. sclerotiorum was investigated. All ...
DOI:
10.1094/PDIS-02-15-0161-RE

5. Screening of Wild and Cultivated Capsicum Germplasm Reveals New Sources of Verticillium Wilt Resistance

Author:
Gurung, Suraj; Short, Dylan P. G.; Hu, Xiaoping; Sandoya, German V.; Hayes, Ryan J.; Subbarao, Krishna V.
Source:
Plant disease 2015 v.99 no.10 pp. 1404-1409
ISSN:
0191-2917
Subject:
Capsicum annuum; Germplasm Resources Information Network; Phytophthora; Verticillium dahliae; Verticillium wilt; breeding; cultivars; disease resistance; germplasm; greenhouses; pathogens; pepper; root rot; screening; soil-borne diseases
Abstract:
... Verticillium wilt caused by Verticillium dahliae is an important soilborne disease of pepper (Capsicum species) worldwide. Most commercial pepper cultivars lack resistance to this pathogen. Our objective was to identify resistance to two V. dahliae isolates in wild and cultivated Capsicum accessions from the core collection of the National Plant Germplasm System of the USDA. Screening of 397 Capsi ...
DOI:
10.1094/PDIS-01-15-0113-RE